Milking-machine.



No. 854,268. PATENTED MAY 21, 1907.

L. BURRELL. MILKING MACHINE.

APPLICATION FILED JAN.12, 1906.

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PATENTED- MAY 21, 1907.

L. BURRELL. MILKING MACHINE. APPLIOATION FILED JAN.12, 1906.

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Specification of Letters Patent.

Patented ma 21, 1907.

. Application filed January 12,1906. Serial lilo. 295,716.

i promote decomposition or other injurious I 2 is a vertical changes in the milk, it is necessary to pre-- vent, as far as possible, access to the milk of such bacteria and substances from the sun rounding air.

My invention has for its objects to sim plify the mechanism and to proviclc'the same with means for preventing objectionable substances lrr'cn entering the receiving vessel or pail and'containinating the milk therein. 7

in the accompanying drawings, consisting of two sheets: Figure l is an elevation of a. milking machine embodying my improve ments, the figure showing-one oi the sets of tcatcupseonnected with the pulsator.. Fig.

section of the pulsator and connecting parts in line 2-2, Fig. 3. Fig. 3 is a horizontal section in line 3 3, Fig. 2. Fig. l is detached vertical section of the filter in the main suction conduit at right angles to Fig. 2. Fig. 5 is an enlarged sectional view ofthe filter connected with the air inlet of the pulsatorl Fig". 6 is a vertical section through the pulsator at right angles to Fig. 2, showing the pulsator valve in its upper position. Fig. 7 is a vertical section,'showing a trapped chamber in the main suction conduit instead of a filter.

Like letters of reference refer to like parts in the several figures- I 7 A represents the body of the milk pail or receptacle which is closed bythecover it upon which the pulsat-or is mounted, a paclo ing ring it" being interposed, as usual, be tween. the cover and the top rim of the pail. The cover is provided with the usual bail or curved handle c B represents the main suction pipe which,

' leads to the exhaust tank or other ap aratus by which. suction is applied to the pai (3 represents a separating: or intercepting chamber which is arranged in the suction conduit of which the pipe B forms part and which is arranged between said pipe and the suction opening aim the cover a of the milk pail. As shown. in Figs. 1% this intercept ing chamber is filled with a filter, consisting of a packing d of cotton, or other filtering msterial suitable for intercepting particles of liquid, dust or other matter whichare carried on the air which passes through the suction conduit, either from the milk pail to the suc tion conduit or from the latter tothe pail;

This intercepting or separating chamhcr'coni prises a casing e which is prondeclatits bottom. with a nipple e by winch it is secured in the suction opening 0 of the cover a, and a cover e which is secured to the casin r byany suitable mea11s,.for instance, a beit. c and screw c and which is provided with a nipple 3 e to which the suction pipe B isattached.

In the. operation of the machine the air'is drawn by the exhaust from thepail into the main suction pipe and this air carries with it vapor and fine particles of milk which, in the absence of a filter or other intercepting means, are precipitatciupon the interior surface of main suction pipe. When the precipitated moisture reaches the form of drops it flows back to the milk vessels, and as the main suction pipe is often unclean the li uid which so returns from the 'pipeto the Si carries with it objectionable matter by w 'ch the milk is contaminated. The filter intercepts such, liquid particles and prevents the bulk of the same from reaching the. suction pipe. It also prevents any liquid or other impurities which may collect in the main suction pipe from passing to the paiLparticularly during the in rush oi airwhich takes place upon disconnecting the suction pipe from the ail when the operation of milking has been iuished. The matter which is caught by the filter is readily removed. by removing the filtering material and cleaning the filter casing.

Instead of providing the separating or in tercepting chamber with a filter, the charm her may be provided with a bent or trap ed passage F, Fig. 7, in which the liquid or net particles are separated and precipitated by a reversal of the air current.- P The trapped chamber is preferably provided with a-catch basin f of sullicient capacity to hold the quantity of liquid Whichliable to be deposited, and leave above the liquid level a nects this valve with the flexible diaphragm h forming the bottom of the exhaust chamber h The latter is connected with the cover a by a pipe 71 which is alternately laced in communication with the exhausted interior of the pail or the external air by a reversing valve I Which is operated from the piston valve by an arm i, depending rod '1' and spring mechanism K. The latter may be similar to that which is described and shown in my Letters Patent No. 784,780,

I March 14,1905.

The upright valve cylinder G is rovided above the cover a, on opposite si es, with milk inlet ports or nipples 6, each of which is connected in any suitable way with the main milk pipe M, for instance, by a glass tube 1, fixed tube Z and cockZ.

The piston or pulsator valve H is provided in its upper portion with a transverse air port a, suita le for connecting with both milk orts l of the valve cylinder, and with a radi'a air port a which extends from the transverse port n to the side of the valve. In the lower osition'of the piston valve, represented in ig. 2, the port n connects with an air inlet port 0 formed in theside of the valve cylinder G above the cover a. The valve extends below the milk orts l in its upper position, represented in ig. 6, and is provided in its lower portion with lateral'recesses p suitable for placing the milk ports Z in communication with theexhausted interior of the milk vessel in this osition of the valve. tion the air ports a n of the valve are out of re ister with the air inlet port 0 of the valve cy inder, the port 0 is closed by the valve, and the recesses p of the valve are in register with the milk ports Z of the cylinder, so that the suction which is applied to the milk vessel acts through the orts 1 upon the milk pipes M and the milk passes through said pipes, orts Z and the recesses of the valve H into t 1e milk vessel. When the pulsator valve is in its lower position, Fig. 2, the milk ports Z are closed by the valve, the suction is cut off from these ports and from the milk pipes M, the air ports at 'n. of the valveare in register with the air inlet ort O and the milk ports Z of the valve cyhn .er and the external .air is'admitted to the milk pipes M, whereby the vacuum in the same is relieved.

2; The air inlet opening-in the valve cylinder minute.

When. the valve is in its upper posiis of such a restricted area with reference to the capacity of the'milk passages and teat cups that the volume of air whichis admittedto these parts while the valve remains in its lower position is suificient to reduce th'e'partial vacuum nearly but not quite to theatmopheric pressure, leaving a sufiicient amount of exhaustion in the milk passages and teat cups to prevent the latter from dropping from the teats. Ordinarily it is advisable toso proportion the parts that the partial vacuum drops to about two inches of mercury wit "the pulsator making about sixty pulsation per An air inlet of about one-eighth of I an inch in diameter is suitable for milk pipes and cups of ordinary size This restricted air inlet is not controlled by a valve'butis always open directly into the outer air and admits the airdirectly to the milk passages during the whole relieving period during which the pulsator valve establishes communication between the air inlet and the milk passages. r l

In order to prevent objectionable matters from entering the milk spaces with the'air, the air inlet opening 0 is guarded by a filter Q through which the air is compelled to pass. This filter is applied by its nipple q to the air inlet opening 0 of the valve cylinder and the filter casing g is provided with the restricted inlet opening g which controls the relieving volume of air which is admitted to the milk pipes and teat cups during each pulsation. The filtering material maybe cotton or some other suitable porous material.

R represents the teat cups which may be of any suitable construction and which are connected with the milk pipe M by a con ne'ctor or manifold coupling S;

I claim as my invention:

1. In a milking machine, the combination of a milk receiving vessel, teat cups connected therewith, a suction conduit which is connected with said vessel and to which suction is applied conti'huously, and. a filter arranged in said conduit and operating to intercept liquid particles which are carried on the airdrawn from the vessel into the suction con duit, the suction resisting the return of the intercepted particles to the receiving vessel, substantially as set forth. I Y i 2. In a milking machine, the combination of a pulsator valve having an air port, and a valve cylinder having an air inlet port and a milk port, the air port in the valve beingarranged to place the air inlet port of the cylinport of t e pulsator valve, substantially as set forth.

3. The combination of a milkg'vessel proyided with a valve cylinder having a milk port and having ir its side a restricted air inlet which communicates directly and without the intervention of a valve with the outer air, and a pnlsator valve which is provided with an air port'arranged to place the air inlet of the cylinder in connnunication with said milk port, substantially as set forth.

4: In. a milking machine, the combination of milk receiving vessel having areniovable cover, a pulsator valve and cylinder arranged upon said cover, a milk pipe connected with said valve cylinder, teat cups connected with said milk pipe, and a restricted air inlet formed on said alve cylinder, substantially as set Forth 5. In a milking machine, the combination of a pulsator valve, an inlet for admitting the external air to the milk passage, and a filter which. covers said, inlet and through which the air is compelled to pass, substantially as set forth.

, set forth.

7. In a milking machine, the combination I of a milk receiving vessel having a removable cover, a pulsator valve and cylinder arranged upon said cover, said cylinder being provided with an inlet for admitting the external air, and a filter which is secnred to said inlet, substantially as set forth.

Witness my hand, this third day of J annary, 1906.

LOOMIS BURRELL.

Witnesses CHAS. B. DALZELL, F. A. LAUIL, 

